Eraser mounting



Patented Dec. 2, 1941 UNITED STATES PATENT OFFICE ERASER MOUNTING James P..0wen, Nashville, Tenn.

Application July 9, 1941, Serial No. 401,639

4 Claims.

My invention relates to erasers for use on lead pencils and has for an object the provision of an eraser of adequate size to perform its designed function and also to last or remain operative throughout the life of the pencil.

While many forms of erasers have been provided for use on pencils, they have invariably been formed so small in size 'that they would give a very limited duration of service and would seldom last for the useful life of the pencil upon which they were mounted.

It is therefore an object of my invention to provide an eraser having a relatively large diameter and length to increase its period of usefulness.

It is a further object of my invention to provide an improved mounting for the eraser and also a cover to enclose same when the eraser is not in use, the cover being mounted for axial movement along the eraser mounting to expose the eraser for use or to cover the eraser when same is not to be used. The cover also serves to support the eraser when same is being used.

My invention further contemplates the provision of an eraser of this kind in which the cover for the eraser may be formed to resemble the appearance of a bottle and bear suitable advertising matter thereon.

My invention further contemplates the provision of a cover for an eraser having means formed thereon for threaded engagement with th eraser mounting for the purpose of moving the cover axially of the eraser and eraser mounting.

My invention embodies other novel features, details of construction and arrangement of parts which are hereinafter set forth in the specification and claims and illustrated in the accompanying drawing, forming part thereof, wherein:

Fig. 1 is a longitudinal sectional view showing my improved eraser mounted on the end of a pencil, and in which the cover for the eraser is shown in its outer position to cover the entire length of the eraser; and

Fig. 2 is a sectional view showing the cover for the eraser moved to its inner position to leave the eraser exposed throughout its working length.

Referring now to the drawing for a better understanding of my invention, I show a pencil 6 which forms no part of the present invention but which may be formed of less than the standard length when employed for use with my im proved eraser and also replaced by a new pencil when desired. An eraser I of cylindrical form is mounted in the end of a mountain; 8 which enlarged at 9 to receive the eraser and then reduced in diameter at H to receive the end of the pencil. The enlarged end 9 of the mounting is formed with threads I2 to receive for threaded engagement a cover I4. The cover is formed cylindrical throughout the length of the eraser and reduced in diameter at Hi to shoulder against the enlarged end of the mounting 8 when the cover is moved to its outer position. A plurality of lugs II are formed on the inner surface of the cover for engagement in the threads formed on the mounting.

A beaded shoulder 18 is formed on the mounting 8 for engagement with the inner end of the cover l4 when the cover is moved to its inner position. A beaded shoulder I9 is formed on the mounting to engage the end of the pencil 6. Slots 2| may be formed in the inner end of the cover I 4 to facilitate the assembly of the cover over the mounting. The inner end of the mounting may be slotted at 22, if desired, to provide a flexible socket for the pencil.

In the use of this form of eraser, the cover I4 is threaded inwardly to expose the desired length of eraser and also to serve as a support for the eraser during use. After use, the cover may be threaded outwardly to cover the entire eraser and serves to protect the end of the eraser from grease or dirt. When the cover is moved to its inner position as shown in Fig. 2, it will be observed that the cover is out of threaded engagement with the mounting 8 and is free to rotate about the mounting.

While I have shown my invention in but one form it is obvious to those skilled in the art that it is not so limited but is susceptible of various changes and modifications without departing from the spirit thereof.

I claim:

1. In an article of the class described, an eraser mounting having its one end formed to receive a pencil and its other end enlarged to receive the eraser, a cover mounted for axial movement on the mounting and extending beyond the outer end of the eraser when in its outer position, a shoulder formed on the inner end of the cover for engagement with a shoulder formed by the enlargement of the eraser end of the mounting to prevent accidental displacement of the cover from the mounting.

2. In an article of the class described, an eraser mounting having its one end formed to receive a pencil and its other end enlarged to receive the eraser, threads formed on the enlarged end of the mounting, a cover mounted for axial movement on the mounting and in engagement with the threads thereon, said cover extending beyond the outer end of the eraser when in its outer position, a shoulder formed on the inner end of the cover for engagement against the enlarged end of the mounting to prevent accidental displacement of the cover, and a shoulder formed on the mounting to preven t an inward displacement of the cover, said cover being out of threaded engagement with the mounting when moved to its inner position 

